my 95+ pound lab actually prefers the large to the x-large that my husband and friends are STILL making fun of me for buying to "make the dog more comfortable." dogs like dens, and when a 5 year old, a 2 year old, AND your humongo lab can fit in the x-large, the "den effect" may get a little lost in the process. humans like large spaces, but many dogs actually prefer the smaller ones. i would just hang onto it, and then if for whatever reason he seems unusually uncomfortable, or turns into a great dane, then go up. but seriously, my DK and my gsp can BOTH ride in a LARGE more than comfortably, and they are NOT small animals. however, i also dont think you should leave dogs in crates for unusually extended amounts of time, so it is hard for me to justify buying crates that are like small dog runs for my dogs. then again, i only have to use crates as a place to sleep at night or a place to hang out while i am out of the house when the dogs are home alone to prevent those unwanted surprises that tend to be there when you get home

. good luck !
sudie